php小编小新为您带来了一篇关于在Go中使用AWS SES v2发送带附件的原始电子邮件的文章。AWS SES v2是一种灵活可靠的电子邮件服务,而Go是一种强大的编程语言,两者的结合能帮助您轻松发送带有附件的原始电子邮件。本文将详细介绍如何使用AWS SES v2 API和Go语言编写代码,以实现这一功能。无论您是初学者还是有经验的开发者,本文都将为您提供清晰的指导,助您顺利完成任务。让我们一起开始吧!
我正在尝试创建一个 http 端点来处理从网站提交的表单。
该表单具有以下字段:
然后,我的端点将向 [email protected]
发送一封电子邮件,其中照片作为附件,电子邮件正文如下:
john ([email protected]) says: email body ...
我是 go 新手,但我已经尝试让它工作 2 周了,但仍然没有任何运气。
我现在的代码是:
package aj import ( "bytes" "encoding/base64" "fmt" "io/ioutil" "mime" "net/http" "net/mail" "net/textproto" "os" "github.com/aws/aws-sdk-go-v2/aws" "github.com/aws/aws-sdk-go-v2/service/sesv2" "github.com/aws/aws-sdk-go-v2/service/sesv2/types" "go.uber.org/zap" ) const expectedContentType string = "multipart/form-data" const charset string = "UTF-8" func FormSubmissionHandler(logger *zap.Logger, emailSender EmailSender) http.Handler { return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { logger.Info("running the form submission handler...") // get the destination email address destinationEmail := os.Getenv("DESTINATION_EMAIL") // get the subject line of the email emailSubject := os.Getenv("EMAIL_SUBJECT") // enforce a multipart/form-data content-type contentType := r.Header.Get("content-type") mediatype, _, err := mime.ParseMediaType(contentType) if err != nil { logger.Error("error when parsing the mime type", zap.Error(err)) http.Error(w, err.Error(), http.StatusBadRequest) return } if mediatype != expectedContentType { logger.Error("unsupported content-type", zap.Error(err)) http.Error(w, fmt.Sprintf("api expects %v content-type", expectedContentType), http.StatusUnsupportedMediaType) return } err = r.ParseMultipartForm(10 << 20) if err != nil { logger.Error("error parsing form data", zap.Error(err)) http.Error(w, "error parsing form data", http.StatusBadRequest) return } name := r.MultipartForm.Value["name"] if len(name) == 0 { logger.Error("name not set", zap.Error(err)) http.Error(w, "api expects name to be set", http.StatusBadRequest) return } email := r.MultipartForm.Value["email"] if len(email) == 0 { logger.Error("email not set", zap.Error(err)) http.Error(w, "api expects email to be set", http.StatusBadRequest) return } phone := r.MultipartForm.Value["phone"] if len(phone) == 0 { logger.Error("phone not set", zap.Error(err)) http.Error(w, "api expects phone to be set", http.StatusBadRequest) return } body := r.MultipartForm.Value["body"] if len(body) == 0 { logger.Error("body not set", zap.Error(err)) http.Error(w, "api expects body to be set", http.StatusBadRequest) return } files := r.MultipartForm.File["photos"] if len(files) == 0 { logger.Error("no files were submitted", zap.Error(err)) http.Error(w, "api expects one or more files to be submitted", http.StatusBadRequest) return } emailService := NewEmailService() sendEmailInput := sesv2.SendEmailInput{} destination := &types.Destination{ ToAddresses: []string{destinationEmail}, } // add the attachments to the email for _, file := range files { f, err := file.Open() if err != nil { http.Error(w, err.Error(), http.StatusInternalServerError) return } defer f.Close() // not sure what to do here to get the email with the attachements } message := &types.RawMessage{ Data: make([]byte, 0), // This must change to be the bytes of the raw message } content := &types.EmailContent{ Raw: message, } sendEmailInput.Content = content sendEmailInput.Destination = destination sendEmailInput.FromEmailAddress = aws.String(email[0]) err = emailService.SendEmail(logger, r.Context(), &sendEmailInput) if err != nil { logger.Error("an error occured sending the email", zap.Error(err)) http.Error(w, "error sending email", http.StatusBadRequest) return } w.WriteHeader(http.StatusOK) }) }
我的理解是(如果我错了,请纠正我)我必须以与此类似的格式构建原始消息。假设这是正确的,我只是不知道如何在 go 中做到这一点
为了创建附件,您必须使用 base64
消息内容来 encode
。
这里是发送 csv 作为附件的示例:
import ( // ... secretutils "github.com/alessiosavi/GoGPUtils/aws/secrets" sesutils "github.com/alessiosavi/GoGPUtils/aws/ses" ) type MailConf struct { FromName string `json:"from_name,omitempty"` FromMail string `json:"from_mail,omitempty"` To string `json:"to,omitempty"` CC []string `json:"cc,omitempty"` } func SendRawMail(filename string, data []byte) error { var mailConf MailConf if err := secretutils.UnmarshalSecret(os.Getenv("XXX_YOUR_SECRET_STORED_IN_AWS"), &mailConf); err != nil { return err } subject := fmt.Sprintf("Found errors for the following file: %s", filename) var carbonCopy string if len(mailConf.CC) > 0 { carbonCopy = stringutils.JoinSeparator(",", mailConf.CC...) } else { carbonCopy = "" } raw := fmt.Sprintf(`From: "%[1]s" <%[2]s> To: %[3]s Cc: %[4]s Subject: %[5]s Content-Type: multipart/mixed; boundary="1" --1 Content-Type: multipart/alternative; boundary="sub_1" --sub_1 Content-Type: string/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Please see the attached file for a list of errors --sub_1 Content-Type: string/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <html> <head></head> <body> <h1>%[6]s</h1> <p><h2>Please see the attached file for the list of the rows.<h2></p> </body> </html> --sub_1-- --1 Content-Type: string/plain; name="errors_%[6]s" Content-Description: errors_%[6]s Content-Disposition: attachment;filename="errors_%[6]s"; creation-date="%[7]s"; Content-Transfer-Encoding: base64 %[8]s --1--`, mailConf.FromName, mailConf.FromMail, mailConf.To, carbonCopy, subject, strings.Replace(filename, ".csv", ".json", 1), time.Now().Format("2-Jan-06 3.04.05 PM"), base64.StdEncoding.EncodeToString(data)) return sesutils.SendMail([]byte(raw)) }
以上是通过 AWS SES v2 在 Go 中发送带有附件的原始电子邮件的详细内容。更多信息请关注PHP中文网其他相关文章!